Other degenerative diseases of the nervous system (G30-G32) ICD-10-CM
The G30–G32 section covers other degenerative diseases of the nervous system with 27 ICD-10-CM diagnosis codes, of which 21 are billable in fiscal year 2026. The section is organized into the 3 code ranges listed below.
Code Ranges in This Section 3 ranges · 27 codes
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the G30–G32 Code Range
ICD-10 codes G30 through G32 cover a range of other degenerative diseases of the nervous system, primarily focusing on Alzheimer's disease and various types of neurodegenerative disorders affecting brain function and structure.
This range begins with G30 codes, specifying variations of Alzheimer's disease. For example, G30.0 denotes early onset Alzheimer's, also known as presenile dementia or primary degenerative dementia of the Alzheimer type with early symptoms like behavioral disturbances. In contrast, G30.1 refers to late onset Alzheimer’s disease, often presenting with depressive or paranoid features. Other codes such as G30.8 and G30.9 capture atypical or unspecified forms of Alzheimer’s. The next block, G31, addresses other degenerative nervous system diseases, including frontotemporal dementia (G31.0) and Pick’s disease (G31.01), alongside alcohol-related degeneration (G31.2) and rare hereditary conditions like Leigh’s disease (G31.82). Additionally, G31.83 identifies neurocognitive disorders with Lewy bodies, a form tied to Parkinsonism and dementia. Lastly, G32 codes capture degenerative nervous system disorders linked to other systemic diseases, such as vitamin B12 deficiency causing subacute combined spinal cord degeneration (G32.0) or cerebellar ataxia in systemic illness (G32.81). These codes are vital for medical coders and healthcare professionals to pinpoint specific neurodegenerative diagnoses, facilitating accurate documentation and targeted care.
Questions About This Page
How many codes are in the G30-G32 range?
The G30-G32 range contains 27 ICD-10-CM diagnosis codes in FY 2026. 21 of them are billable, and the rest are category headers that organize the section.
What conditions does G30-G32 cover?
The range covers other degenerative diseases of the nervous system. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
